PHYLOGENOMICS REVEALS EXTENSIVE RETICULATE EVOLUTION IN XIPHOPHORUS FISHES
PHYLOGENOMICS REVEALS EXTENSIVE RETICULATE EVOLUTION IN XIPHOPHORUS FISHES
复制标题
DOI：
10.1111/evo.12099
复制
发表时间：
2013-08-01
期刊：
影响因子：
3.3
通讯作者：
Rosenthal, Gil G.
中科院分区：
文献类型：
--
作者：
Cui, Rongfeng;Schumer, Molly;Rosenthal, Gil G.
杂交越来越被认为是一个广泛的过程，甚至在生态和行为上不同的动物物种之间。在杂交的情况下确定系统发育关系仍然是进化生物学家面临的主要挑战，但测序技术和系统发育技术的进步正在开始解决这些挑战。在这里，我们重建剑尾鱼和鸭嘴鱼（剑尾鱼：Poeciliidae），一组具有显着的形态多样性和行为障碍种间交配的物种之间的进化关系。过去试图重建剑尾鱼的系统发育关系产生了相互矛盾的结果。由于该属的26个物种中有许多是可交配的，这些冲突可能是由于杂交。使用基因组数据，我们解决了一个高置信度的剑尾鱼种树，占不完整的谱系排序和杂交。我们的研究结果使我们能够重新审视一个长期存在的争议的性选择剑在Xiphophorus的进化，并证明杂交已经惊人的普遍在这个属的进化历史。
Hybridization is increasingly being recognized as a widespread process, even between ecologically and behaviorally divergent animal species. Determining phylogenetic relationships in the presence of hybridization remains a major challenge for evolutionary biologists, but advances in sequencing technology and phylogenetic techniques are beginning to address these challenges. Here we reconstruct evolutionary relationships among swordtails and platyfishes (Xiphophorus: Poeciliidae), a group of species characterized by remarkable morphological diversity and behavioral barriers to interspecific mating. Past attempts to reconstruct phylogenetic relationships within Xiphophorus have produced conflicting results. Because many of the 26 species in the genus are interfertile, these conflicts are likely due to hybridization. Using genomic data, we resolve a high-confidence species tree of Xiphophorus that accounts for both incomplete lineage sorting and hybridization. Our results allow us to reexamine a long-standing controversy about the evolution of the sexually selected sword in Xiphophorus, and demonstrate that hybridization has been strikingly widespread in the evolutionary history of this genus.